Commit c22cf380 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Peter Zijlstra
Browse files

x86/entry: Make some entry symbols global 



paranoid_entry(), error_entry() and xen_error_entry() have to be
exempted from call accounting by thunk patching because they are
before UNTRAIN_RET.

Expose them so they are available in the alternative code.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220915111147.265598113@infradead.org
parent fe54d079

arch/x86/entry/entry_64.S

+6 −3
Original line number Diff line number Diff line
@@ -327,7 +327,8 @@ SYM_CODE_END(ret_from_fork) 
#endif

.endm



SYM_CODE_START_LOCAL(xen_error_entry)

SYM_CODE_START(xen_error_entry)

	ANNOTATE_NOENDBR

	UNWIND_HINT_FUNC

	PUSH_AND_CLEAR_REGS save_ret=1

	ENCODE_FRAME_POINTER 8
@@ -906,7 +907,8 @@ SYM_CODE_END(xen_failsafe_callback) 
 * R14 - old CR3

 * R15 - old SPEC_CTRL

 */

SYM_CODE_START_LOCAL(paranoid_entry)

SYM_CODE_START(paranoid_entry)

	ANNOTATE_NOENDBR

	UNWIND_HINT_FUNC

	PUSH_AND_CLEAR_REGS save_ret=1

	ENCODE_FRAME_POINTER 8
@@ -1041,7 +1043,8 @@ SYM_CODE_END(paranoid_exit) 
/*

 * Switch GS and CR3 if needed.

 */

SYM_CODE_START_LOCAL(error_entry)

SYM_CODE_START(error_entry)

	ANNOTATE_NOENDBR

	UNWIND_HINT_FUNC



	PUSH_AND_CLEAR_REGS save_ret=1